Effects of Core Concrete on the Buckling Behavior of Ultra-High Strength Reinforcement Bars
Effects of Core Concrete on the Buckling Behavior of Ultra-High Strength Reinforcement Bars
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DOI：
10.2749/newyork.2019.2083
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Zhou;Pengjun Luo;T. Takeuchi;Yuping Sun
中科院分区：
文献类型：
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作者：
A. Zhou;Pengjun Luo;T. Takeuchi;Yuping Sun
钢筋屈曲是钢筋混凝土结构在强震作用下的一个重要问题，它可能导致钢筋混凝土构件承载力的急剧下降。为研究核心混凝土对超高强度钢筋抗屈曲性能的影响，制作了6根方形钢筋混凝土柱，进行了单调受压试验。所有柱具有150-mm正方形截面并且高度为300 mm。侧箍的间距分别选择为50 mm（40）、75 mm（60）和100 mm（80）。试验结果表明，核心混凝土对超高强度钢筋的屈曲有很大影响，在超高强度钢筋混凝土构件的抗震设计中应予以充分考虑。
The buckling of reinforcement bars, which may result in abrupt load-capacity degradation of reinforced concrete (RC) components, is definitely a critical issue in structures exposed to severe earthquakes. In the present study, six square RC columns were fabricated and tested under monotonic compression to investigate the influence of the core concrete on the buckling-resistant behavior of ultra-high strength reinforcement bars. All columns had a 150-mm square section and were 300 mm in height. The spacing of lateral hoops was selected as 50 mm (40), 75 mm (60), and 100 mm (80), respectively. The experimental results indicated that the core concrete strongly affected the buckling of ultra-high strength reinforcement bars and should be carefully considered in the seismic design of RC components reinforced by the ultra-high strength bars.